Valve-motion for rock-drills.



L. G. BAYLES. VALVE MOTION FOR 300K DRILLS.

APPLICATION FILED FEB-1, 1910.

Patented Feb.28, 1911.

' l'i'awenZ- To all whom it may concernt COMPANY, OF NEW YORK, N. Y.,

STATES PATENT OFFICE.

ANSVAAL, ASSIGNOR TO INGERSOLL-RAND A CORPORATION OF NEW JERSEY.

. VALVE-MOTION FOR ROCK-DRILL$.

Be it known that I, LEWIS C. BAYLEs, a citizen of-the United States, and resident of Johannesburg, Transvaal, have inventeda new and useful Valve-Motion for Rock- Drills, of which the following is a specification. 1 I

This invention relates to a valve motion for'rock drills and has for its object to provide certain improvements in the construction, form and operation of the valve mechanism whereby a valve may be employed which is very simple in construction, positive in its action and which has a very slight movement to accomplish the alternate opening and closing of the inlet and discharge passages for the opposite ends of the plston chamber, the action of the valve bei'ng automatic. A practical embodiment of my invention is represented in the accompanying drawlngs, in which.'

Figure 1 represents in longitudinal central section so much of a rock drill as will give a clear understanding of my invention, Fig. 2 is a section taken in the plane of the line AA of Fig. 1, looking in the direction of the arrows, Fig. 3 is a top plan view of the cylinder, the valve chest being shown in horizontal section taken in the plane of the line B-B of Fig. 1, and Fig. 4 is a detail view similar to Fig. 3, with the valve ilqn its position opposite to that shown in The cylinder of the rock drill is denoted by l and its piston by 2. The valve. chest is denoted. by 3, which valve chest is provided with and outlet chambers 5,6. Intermediate the inlet and'outlet chambers is locateda vertical cylindrical chamber 7, from the face of whichwhamber a slot 8 leads to the inlet chamber 4. The outlet chambers 5, 6, also lead from the face of this chamber 7.

i A triple winged valve 9, 10, 11, 12, has its cylindrical body portion 12 fitted to the cylindrical chamber 7, its wing 9 projected into the slot Sand its wings 10, 11,'into the chambers 5 and 6. The width of the slot 8 and the chambers 5 and 6 and the thickness of the wings 9, 10, 11, are such that the valve is permitted a slight oscillatory move-- Specification of Letters Patent. Application filed February 1, 1910. Serial No. 541,290.

valve seats for the inl ports 13 i the o "and 18 open into branches 21,

a motive fluid inlet chamber 4 Patented Feb. 28, 1911. I

posite faces of the wing 10 alternately into engagement with the seats for the exhaust ports 15, 16, and the opposite faces of the wing 11 alternately into engagement with the valve seats for the exhaust The port 13 opens into the fluid inlet passage 19 which leads to the front end of the cylinder chamber and the port 14 opens into the inlet passage 20 whichleads to the back end of the cylinder chamber.-

22, of a discharge passage 23 leading to the front end of the cylinder chamber and the ports 15, 17 open into branches 24, 25, of a discharge passage 26 leading into the back of the cylinder chamber.

Presupposing the parts to be in the position shown in Figs. 1, 2 and 3, withthe piston 2 traveling in the direction shown by the arrow'thereon, has opened the motive fluid inlet passage 20 to the main inlet chamber 4 and has closed the motive fluid passage 19. Atthe same time, the Wings 10 and 11 have opened the branches 21, 22, of the discharge passage 23 to the external atmosphere through the chambers 5 and 6 and these wings 10 and .11 have, at the same time, closed the branches 24, 25, of the discharge passage 26. As the piston 2 nears the limit of its forward movement, it will first close the discharge passage 23 and for the balance of its forward movement will compress the motive fluid in the passage 19 sufliciently to throwthe valve over into theposition shown in Fig.

4, thus opening the motivefluid inlet passage 19 to the main inlet chamber 4 and opening the fiu'id discharge passage26 to external atmosphere and, at the same time closing the inlet passage 20" and the dis 1 charge passage 23. This will start. the piston on its return movement and as itnears the limit of its return movement it will first disclose the discharge passage 26 and then compress the fluid sufliciently in the inlet passage 20 to throw the valve back to the position shown in Fig. 3. It will thus be seen that the valveandports, constructed I and arranged as herein the valve to control the opening and closing,

set forth, permits not only of the inlet passages but also of the' discharge passages so as to insure a suificlent overbalancing of pressure uponthe valve ports 17, 18. 60

The ports 16 65 the wing 9 of the valve 75 self to such use ciprocation wmgs to throw the valve automatically at the desired times to insure the proper reof the piston. While I have shown this valve mechanism in connection with a rock drill, it is to be understood that I do not wish to limit mywherever applicable in percussive machines or tools. 7

valve comprising i outwardlybeyond the body outwardly beyond passages, its piston, .a valve 1. A cylinder .h'aving inlet and discharge. passages, its piston, a. valve chest and a valve comprising a central body portion and a plurality of wings projectin outwardly beyond the body portion, said wings being arranged to control the opening. and closing 'of both the inlet and discharge passages when the valves at thelimits of its moveing -and closing of both the inletand dis-- charge passages when-the valve is at the limits of its movements. 1

4. A cylinderhaving inlet and discharge passages, its piston, a valve chest and an oscillating'valve comprising a central body .portion and a plurality of wings projecting the body portion, said win slicing arranged to open and close both the inlet and discharge passages valve is at the limits ofits movements.

5. A cylinder having independent inlet and discharge passages for both ends, its

1 a central body portion k and discharge 7 passages a valve comprising and a plurality of wings projecting outwardly beyond the body portion, said wingsbeing arranged to control the o ening and closing of both the piston, a valve chest and inlet and ischarge passages when the valve is at the limits of its movements.

6. A .cylinder having independent inlet and discharge passages for both ends, its

piston, a valve chest and a valve comprising a central body portion and a plurality of wingsprojecting outwardly beyond the body portion, said wings being arranged to open andclose both the inlet and discharge pas sages when the'valve is at the'limits of its movements.

7. A cylinder having independent inlet piston, avalve chest and anoscillating valve but contemplate its use.

sages for both ends of the 0;

when the of the cylinder, and close for both ends, its

comprising a ficentral body portion and a plurality of wings projecting outwardly beyond the body port1on,-'said wings being arranged to control the. opening and closing of. both the inlet and discharge passages when the valve is at the limits of its movements.

8. A cylinder having independent inlet and discharge passages for both ends, it; piston, a valvechestand an oscillating valve comprising a central body portion and a plurality of wings projecting outwardly be-.

said wings being aryond the body portion,

both the inlet and ranged to open andclose discharge passages when the valve is at the limits of its movements.

'9. At cylinder, its piston, a valve chest, a valve comprising a central body portion and a plurality of wings projecting therefrom, and inlet and discharge passages opemng to the faces of the valve wings arranged to be opened and closed thereby.

10., A cylinder, its piston, a valve chest having independent inlet and discharge pas linder and a fluid-actuated valve comprising a central body portion and a: plurality of wings projectmg outwardly from, the body portion arranged to simultaneously open the-inlet e for one end and the discharge passage or the other end of the'cyl-inder. 1 p 1]. A cylinder, its piston, a valve chest having independent inlet and discharge passages for both ends of the cylinder and a fluid-actuated valve com risin a central body portion and a plura ity of wings propassa jectin outwardly from the body portion aren the inlet pas range to simultaneously 0 sage for one end and the ischarge passage for the other end of the cylinder, and close the other inlet and discharge passages.

1-2'. A cylinder, its piston, having independent inlet and discharge passages for both ends of the cylinder and a fluid-actuated oscillating valve com risin a central-body portion anda plura lty o a valve chest wings projecting outwardly from the body 7 ortion arran edto simultaneousl open the 1n1et passage or one end of the cy inder and the discharge passage for the other end of the cylinder. 4

; 13. A cylinder, its piston, a valve chest having independent inlet and discharge passa es for both a flui -actuated oscillating valve comprising a central'body portion and a plurality of wings projecting outwardly from the body portion arranged to simultaneously open the inlet passage for one end of the cylinder and the discharge passagefor theother end the other inlet and discharge'passages.

14. A cylinder, its piston,a plural winged valve, a valve chest, and independent inlet and discharge passages for both ends of the ends of the cylinder and faces of the valve arranged to simulpassage for one end and the discharge passage for the other end of the cylinder.

15. A cylinder,

cylinder opening to the wings, said valve being its piston, a plural winged valve, a valve chest, and independent inlet a and discharge passages for both ends of the cylinder opening to the faces of the valve wings, said valve being arranged to simultaneously open the inlet passage for one end and the discharge passage for the other end of the cylinder, and. close the other inlet and discharge passages.

16. A cylinder, its

piston,a plural winged oscillating valve,

a valve chest, and independent inlet and discharge passages for both ends of the cylinder opening to the faces of the valve wings, said valve bein arranged to simultaneously open the inlet passage for one end and the discharge passage for the other end of the cylinder.

17. A cylinder, its piston,a plural winged oscillating valve, a valve chest, and, independent inlet and discharge passages for both ends of the cylinder opening to the faces of the valve wings, said valve being arranged to simultaneously open the inlet passage for one end and the discharge passage for the other end of the cylinder, and close the other inlet and discharge passages.

18. A cylinder, its lpiston, a valve chesthaving independent in ct and dischargepassages for both ends of three-winged oscillating valve wing arranged to alternately open and close the inlet passages and the other wings arranged to alternately open and close the discharge passages.

19. A cylinder, its piston, a valve chest, independent inlet anddischarge passages for both ends of the cylinder having ports opening into the valve chest and'a valve arranged to open and close said orts by a movement substantially perpendicular to the faces of the ports.

20. A cylinder, its piston, a valve chest containing a valve chamber having three radially disposed slots, one. communicatin with the motive fluid inlet and the other two with external atmosphere, inlet passages for both ends of the cylinder leading to the inhaving one let slot, discharge passages for both ends of the cylinder leading to the exhaust slots, and a three-winged oscillating valve seated in the valve chamber with its wings located in said: slots for alternately opening and closing the inlet and (.lischarge passages.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this 26th day of January 1910. p

- LEWIS U. BAYLES. Witnesses:

F. Gnonen BARRY, C. S. LUNDGREN.

the cylinder. and a 

